2 files changed, 8 insertions, 8 deletions

diff --git a/ui-stats.c b/ui-stats.c
index a264f6a..9cd8247 100644
--- a/ui-stats.c
+++ b/ui-stats.c
@@ -125,7 +125,7 @@ static char *pretty_year(struct tm *tm)
         return fmt("%d", tm->tm_year + 1900);
 }
 
-struct cgit_period periods[] = {
+static const struct cgit_period periods[] = {
         {'w', "week", 12, 4, trunc_week, dec_week, inc_week, pretty_week},
         {'m', "month", 12, 4, trunc_month, dec_month, inc_month, pretty_month},
         {'q', "quarter", 12, 4, trunc_quarter, dec_quarter, inc_quarter, pretty_quarter},
@@ -136,7 +136,7 @@ struct cgit_period periods[] = {
  * and update the period pointer to the correcsponding struct.
  * If no matching code is found, return 0.
  */
-int cgit_find_stats_period(const char *expr, struct cgit_period **period)
+int cgit_find_stats_period(const char *expr, const struct cgit_period **period)
 {
         int i;
         char code = '\0';
@@ -165,7 +165,7 @@ const char *cgit_find_stats_periodname(int idx)
 }
 
 static void add_commit(struct string_list *authors, struct commit *commit,
-        struct cgit_period *period)
+        const struct cgit_period *period)
 {
         struct commitinfo *info;
         struct string_list_item *author, *item;
@@ -209,7 +209,7 @@ static int cmp_total_commits(const void *a1, const void *a2)
 /* Walk the commit DAG and collect number of commits per author per
  * timeperiod into a nested string_list collection.
  */
-static struct string_list collect_stats(struct cgit_period *period)
+static struct string_list collect_stats(const struct cgit_period *period)
 {
         struct string_list authors;
         struct rev_info rev;
@@ -256,7 +256,7 @@ static void print_combined_authorrow(struct string_list *authors, int from,
                                      const char *leftclass,
                                      const char *centerclass,
                                      const char *rightclass,
-                                     struct cgit_period *period)
+                                     const struct cgit_period *period)
 {
         struct string_list_item *author;
         struct authorstat *authorstat;
@@ -295,7 +295,7 @@ static void print_combined_authorrow(struct string_list *authors, int from,
 }
 
 static void print_authors(struct string_list *authors, int top,
-                          struct cgit_period *period)
+                          const struct cgit_period *period)
 {
         struct string_list_item *author;
         struct authorstat *authorstat;
@@ -363,7 +363,7 @@ static void print_authors(struct string_list *authors, int top,
 void cgit_show_stats(void)
 {
         struct string_list authors;
-        struct cgit_period *period;
+        const struct cgit_period *period;
         int top, i;
         const char *code = "w";
 
diff --git a/ui-stats.h b/ui-stats.h
index 341ab13..0e61b03 100644
--- a/ui-stats.h
+++ b/ui-stats.h
@@ -20,7 +20,7 @@ struct cgit_period {
         char *(*pretty)(struct tm *tm);
 };
 
-extern int cgit_find_stats_period(const char *expr, struct cgit_period **period);
+extern int cgit_find_stats_period(const char *expr, const struct cgit_period **period);
 extern const char *cgit_find_stats_periodname(int idx);
 
 extern void cgit_show_stats(void);